Firebase Auth vs Supabase Auth

Firebase Auth vs Supabase Auth comparison for BaaS authentication. Compare Google's Firebase with the open-source Supabase alternative.

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Verdict Rapide

Gagnant: Ça dépend

Firebase Auth is mature and battle-tested from Google. Supabase Auth is open-source with great Postgres integration. Choose Firebase for its ecosystem; choose Supabase for open-source and SQL.

Choisissez Firebase Authentication si...

✓ You're already using Firebase services
✓ You need phone authentication
✓ You want Google's infrastructure
✓ You're building a mobile app
✓ You need anonymous authentication

Choisissez Supabase Auth si...

✓ You prefer open-source solutions
✓ You want tight Postgres integration
✓ Row Level Security is important
✓ You want to self-host if needed
✓ You prefer SQL over NoSQL

Comparaison Fonctionnalité par Fonctionnalité

Catégorie	Firebase Authentication	Supabase Auth	Gagnant
Pricing	Free tier generous. Phone auth: $0.01-0.06/verification.	Free with Supabase. Unlimited auth on free plan.	Égalité
Free Tier	Unlimited email/social auth. 10k phone verifications/mo.	Unlimited users. All auth methods included.	Égalité
Developer Experience	Mature SDK. Well-documented. Firebase console.	Modern SDK. TypeScript-first. Nice dashboard.	Égalité
Documentation	Extensive docs from Google. Many tutorials and examples.	Good docs. Improving but less comprehensive.	Firebase Authentication
Scalability	Google infrastructure. Proven at massive scale.	Scales well. Growing infrastructure.	Firebase Authentication
Features	Email, phone, social, anonymous, custom tokens, MFA.	Email, phone, social, magic links, MFA, RLS integration.	Firebase Authentication

Comparaison de Code

typescript

import { getAuth, signInWithPopup, GoogleAuthProvider } from 'firebase/auth';

const auth = getAuth();
const provider = new GoogleAuthProvider();

const result = await signInWithPopup(auth, provider);
const user = result.user;

Firebase Auth has mature, well-tested SDKs.

typescript

import { createClient } from '@supabase/supabase-js';

const supabase = createClient(url, anonKey);

const { data, error } = await supabase.auth.signInWithOAuth({
  provider: 'google',
});

// User can immediately query RLS-protected tables

Supabase Auth integrates seamlessly with RLS.

🔄 Notes de Migration

Migration between BaaS platforms is significant. Export user data carefully. Consider the database migration as the larger effort - auth is just one piece.

Questions Fréquemment Posées

Can I self-host either? ▼

Supabase can be self-hosted entirely. Firebase Auth is Google-hosted only, though you can use Firebase Emulators for local development.

Which integrates better with their database? ▼

Supabase Auth has deeper Postgres integration with Row Level Security. Firebase Auth integrates well with Firestore but RLS-equivalent requires Security Rules.

Essayer Firebase Authentication

Simple, secure user authentication

Essayer Supabase Auth

Open source Firebase alternative

⚖ Comparer dans l'Outil Interactif

Dernière mise à jour: January 11, 2026